Zinc plating method
CA 1070638 A · Owner: Kabushiki Kaisha Japan Metal Finishing Company · Inventors: Kaneda, Toyohito; Fujita, Shigeru; Murayama, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article is zinc plated by electrodeposition in an alkaline zinc plating bath of ZnO and NaOH to which has been added, optionally together with a small quantity of an aromatic aldehyde, a polyamine sulfone represented by the general formula, where: each of R1 and R2 is hydrogen an allyl group, a straight-chain or branched-chain alkyl group having 1 to 16 carbon atoms, an aralkyl group or a hydroxyalkyl group of the general formula where m is an integer of 1 to 6;, X- is a halogen ion HSO4-, HSO3-, HCOO-, or, CH3COC-; and, n is an integer such that the number average molecular weight becomes 2,000 to 350,000. a and b are natural numbers having a relation such that a:b = 100: (10 to 100).
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.